Electric heating element



Aug. 18, 1931. I H. H. BERRY I 1,319,537

' ELVECTRIC HEATING E LEljllENT Filed Sept. 1, 1928 Patented A... 18, 1931" nnnnam Emmi BERRY. or LONDON, ENGLAND ELECTRIC nm'rmo summer Application fled September 1, 1928, Serial No. 808,523, and in Great Britten October 28, 1927.

This invention relates to electric heating elements for electric radiators, fires, and the like, and with which a resistance wire of spiral formation is used. 7

One' bject of the invention is to provide improved supporting means for such resist- I ance wires and which will prevent excessive local heating of the wires. I

Another object of the invention is to pro 10 vide a 7 support for such resistance 'wires which prevents excessive lateral displacement and consequent contacting of ad acent coils of the wires.

.With these and other objects in view I 1 construct the support in one or more pieces,

or sections usually in several sections, with spaced projections udapted'to enter between the convolutions of the wire.

In the drawingsz- Fig. 1 is a perspective view of a snpport+ ing section with a projectionformed integrally with the said section.

Fig. 2 is a plan view of two supporting sections with projections between them,-

Fig. 3 is an end View of same and Fig. 4 is a plan view of part of a heating element constructed from the said sect-ions having projections provided between some of them.

In Fi 1 the section 1 has three grooves in which the usual helical resistance wire, not shown, is placed when the element is built up in substantially known manner and at an end of each of the grooves is formed an integral fin-like projection 3 which, in

the completed element, enters between two coils of the resistance wire and holds same 1 against longitudinal displacement. Sections such as 1 withthe fin-like projections'are 40 preferably placed atinterva-ls in the built-up (fiilement, the other sections not having the In 2 to 4the sections are of substantially known type and the projections 5 are provided between them. The said p1'ojec .as 8 are put'in place in grooves 9 the projections enter between some of the coils and hold the resistance against longitudinal displacement.

The element shown. in Fig. 4 has parts 10 arranged to form front supporting arms for the resistance wire and I have found the combination of these arms and the. projec-.

tions very satisfactory in use since the arms 10 and projections 5 collectively hold'the avire very securely in place under all ordinary conditions. 1 What I claim is 2-. a +1.- A supportforthe resistance wires of electric radiators comprising aplurality of sections each of which is formed with a serie's oi'groovcs, means for securing the seetions together to longitudinally align the similar rooves ofthe respective sections, 7 and 1nsu atlng heat reslstmg strlps secured 'by said imeans between adjacent sections, 7 said strips having theirupper edges roject- -ing beyond the wire-receiving sur aces of the grooves to thereby provide projections extending transversely of the grooves to engage between the-.eonvolutions of the resistance wires for holding the wires against lon- 'gitudinal displacement.

2. A support for the resistance wires of a electric radiators comprising a plurality of sections, each of whichis formed with a series of grooves, means for securing the sections together tolongitudinally align the similar grooves of the respective sections, insulating heat resisting strips secured by said means between adjacent sections, said strips having theirnpper edges projecting beyond the wire-receivin surfaces of the grooves to thereby .provi e. projections ex- .9

tending transversely of the grooves to engage between the convolutions of the resistance wires for holding the wires against longitudinal displacement, and members se-' cured between adjacent sections by said means and formed with projections to overlie each of the grooves formed by the aligned sections for retaining the resistance wire against outward displacement.

In testimony whereof I aflix my si nature.

HERBERT HENRY BE BY. 

